What is uterine fluid accumulation?

Uterine fluid accumulation—also known as intrauterine fluid accumulation—is commonly observed in women during clinical examinations. A small amount of fluid in the uterine cavity is generally considered a normal physiological phenomenon. However, if a woman develops symptoms suggestive of uterine fluid accumulation, careful observation is warranted, as it may indicate an underlying pathological condition. So, what exactly is uterine fluid accumulation? Below is an explanation.

What Causes Uterine Fluid Accumulation?

1. Menstrual Hygiene

During menstruation, the endometrium sheds and the uterine cavity becomes temporarily open, creating favorable conditions for bacterial proliferation. Poor menstrual hygiene—or engaging in sexual intercourse during menstruation—may allow bacteria to invade and cause intrauterine infection, leading to endometritis or other forms of uterine inflammation, which are major contributors to uterine fluid accumulation.

2. Uterine Inflammation

Uterine fluid accumulation primarily results from inflammatory exudates. When inflammatory secretions within the uterus cannot drain properly or become obstructed, intrauterine fluid accumulates. The most common cause is ascending infection from endometritis or cervicitis. Typical symptoms include lower abdominal heaviness or pain, systemic manifestations such as fever, elevated white blood cell count, uterine enlargement with soft consistency and tenderness on palpation, and inflammatory adnexal masses.

3. Uterine Bleeding

For example, in patients with uterine fibroids, necrotic tissue from tumor lesions may detach and accumulate over time within the uterine cavity, resulting in fluid accumulation. Cervical adhesions or stenosis—causing narrowing or complete occlusion of the cervical canal—can impede normal menstrual outflow, leading to retained menstrual blood and subsequent intrauterine fluid accumulation.

The above outlines the primary causes of uterine fluid accumulation. We hope this information is helpful to you.